Open AccessPrinciple and performance analysis of coherent tracking sensor based on local oscillator beam nutation
Author(s) -
Ke Deng,
BingZhong Wang,
Guhao Zhao,
Jian Huang,
Peng Zhang,
Dagang Jiang,
Zhoushi Yao
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.023528
Subject(s) - nutation , free space optical communication , optics , local oscillator , physics , sensitivity (control systems) , optical communication , tracking (education) , noise (video) , beam (structure) , phase noise , computer science , electronic engineering , engineering , pedagogy , astronomy , artificial intelligence , image (mathematics) , psychology
By integrating coherent tracking sensor functionality into a coherent communication receiver, a dual-function receiver with coherent boresight error sensing is developed for tracking in coherent free-space optical communication systems. The sensor principles are analyzed according to optical interference theory, and the boresight error detection algorithm and small signal linear model are derived. Analysis of local-oscillator beam nutation on system performance shows that the best nutation half-angle is 0.5-1 μrad, the noise equivalent angle is less than 0.02 μrad, and the communication sensitivity degradation is 0.2-0.6 dB. This technology opens new avenues for free-space optical communication system design.